examples/runtime/watchdog/main.c

#include <runtime-hw/hw.h>
#include <runtime-sys/sys.h>

// CORE 0 TASKS

bool core0_task() {
  // Create the watchdog
  hw_watchdog_t *watchdog = hw_watchdog_init();
  if (!hw_watchdog_valid(watchdog)) {
    sys_printf("core 0: Failed to initialize watchdog\n");
    return false;
  }

  // Explain that the last boot was caused by the watchdog resetting
  if (hw_watchdog_did_reset(watchdog)) {
    sys_printf("Watchdog triggered a reset\n");
  }

  // Run the event processing loop - which is just sleeping for 1s
  int count = 0;
  do {
    sys_printf("Ping the watchdog (%d)\n", count++);
    hw_poll();
    sys_sleep(100);
    if (count == 50) {
      sys_printf("Resetting the watchdog in 5s\n");
      hw_watchdog_reset(watchdog, 5000);
    }
  } while (true);

  // If we were to reach here, finalize the watchdog
  hw_watchdog_finalize(watchdog);

  return true;
}

// MAIN

int main() {
  // Initialize
  sys_init();
  hw_init();

  // Check that watchdog is supported
  if (hw_watchdog_maxtimeout() == 0) {
    sys_printf("Watchdog not supported on this hardware\n");
    return -1;
  }

  // Run the task
  sys_printf("Running %s on %s\n", sys_env_name(), sys_env_serial());
  if (core0_task() == false) {
    sys_printf("Main: core 0 task failed\n");
  }

  // Cleanup and exit
  hw_exit();
  sys_exit();
  return 0;
}